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Fingerprint sensors
Slezák, Jakub ; Frýza, Tomáš (referee) ; Fedra, Petr (advisor)
This bachelor thesis is focused on the possibilities of immediate fingerprinting and the use of these fingerprints to identify people. The content of the thesis is the technological evaluation of contact and contactless fingerprinting. A presentation and execusion of a fingerprint optical scanner with corresponding software is described together with a review of the results.
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Laboratory Switching Power Supply
Slezák, Jakub ; Petržela, Jiří (referee) ; Šebesta, Jiří (advisor)
This bachelor’s thesis is concerned with design switching power supply based on forward converter with output voltage regulated in the range of 3 to 30V and load current to 1 A. First of all, it discusses the theoretical solution of basic types of converters and switching power supply problems. Followed by a proposal of various parts source, which was first established in the test version on the test board. Then was proposed printed circuit board and complete mechanical solutions. Source is also equipped with digital modules for measuring voltage and current, and is protected against overload.
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Real-Time Vein Viewer
Slezák, Jakub ; Harabiš, Vratislav (referee) ; Sekora, Jiří (advisor)
This work is focused on methods of real-time vein imaging using a camera in the near infrared region. The theoretical section describes the dependence of reflectance and absorbance of blood and tissue on the wavelength and suggests appropriate ways of illumination and viewing the bloodstream. The paper describes methods for real-time venous processing and projection. Based on theoretical knowledge a device sensing and projecting an image of real time examination of the venous system and a user-friendly programme for operating this device were created. The created device has been tested on a number of people to confirm proper operation.
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Front end for software receiver
Slezák, Jakub ; Horský, Pavel (referee) ; Šrámek, Petr (advisor)
This thesis deals with a theoretical analysis of the basic parameters of receivers, input circuit architecture and signal digitization. According to the specified assignment it is outlined block scheme of front end for software receiver with specified components and the total bilance is calculated. Individual parts of the system are designed and realized. This is a set of four input filters for bandwidths: short waves up to 30 MHz, 87,5-108 MHz, 144-148 MHz and 174-230 MHz. The main point of design is a circuit containing a low-noise amplifiers, switches, and two amplifiers with adjustable amplification. Mainly are used integrated circuits from Analog Devices corporation. To control the various switches and adjustable amplifiers was designed a separate panel, which is connected to the main circuit via a cable. In the last phase was the whole system and its components subjected to measurements. Thanks to a number of mounted SMA connectors it is possible to measure different parts of the system and we are able to modify it partially.
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Fingerprint sensors
Slezák, Jakub ; Frýza, Tomáš (referee) ; Fedra, Petr (advisor)
This bachelor thesis is focused on the possibilities of immediate fingerprinting and the use of these fingerprints to identify people. The content of the thesis is the technological evaluation of contact and contactless fingerprinting. A presentation and execusion of a fingerprint optical scanner with corresponding software is described together with a review of the results.
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Monitoring the impact of simulated rainfall on soil with flushing water by EIS method
Slezák, Jakub ; Novotná, Jitka (referee) ; Pařílková, Jana (advisor)
The diploma thesis with name “Monitoring the Impact of Simulated Rainfall on Soil with Flushing Water by EIS Method” deals with the problems of soil degradation due to salinization and sodification in consequence of infiltration of flushing waters from roads during winter maintenance. This experiment was realized in laboratories of the Institute of water structures of the Faculty of Civil engineering at Brno University of Technology and researched the influence of simulated rainfall on degraded soil by method of electrical impedance spectrometry (EIS). The thesis follows the solution of projects in international EUREKA program.
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Laboratory Switching Power Supply
Slezák, Jakub ; Petržela, Jiří (referee) ; Šebesta, Jiří (advisor)
This bachelor’s thesis is concerned with design switching power supply based on forward converter with output voltage regulated in the range of 3 to 30V and load current to 1 A. First of all, it discusses the theoretical solution of basic types of converters and switching power supply problems. Followed by a proposal of various parts source, which was first established in the test version on the test board. Then was proposed printed circuit board and complete mechanical solutions. Source is also equipped with digital modules for measuring voltage and current, and is protected against overload.
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Front end for software receiver
Slezák, Jakub ; Horský, Pavel (referee) ; Šrámek, Petr (advisor)
This thesis deals with a theoretical analysis of the basic parameters of receivers, input circuit architecture and signal digitization. According to the specified assignment it is outlined block scheme of front end for software receiver with specified components and the total bilance is calculated. Individual parts of the system are designed and realized. This is a set of four input filters for bandwidths: short waves up to 30 MHz, 87,5-108 MHz, 144-148 MHz and 174-230 MHz. The main point of design is a circuit containing a low-noise amplifiers, switches, and two amplifiers with adjustable amplification. Mainly are used integrated circuits from Analog Devices corporation. To control the various switches and adjustable amplifiers was designed a separate panel, which is connected to the main circuit via a cable. In the last phase was the whole system and its components subjected to measurements. Thanks to a number of mounted SMA connectors it is possible to measure different parts of the system and we are able to modify it partially.
|
|
|
Real-Time Vein Viewer
Slezák, Jakub ; Harabiš, Vratislav (referee) ; Sekora, Jiří (advisor)
This work is focused on methods of real-time vein imaging using a camera in the near infrared region. The theoretical section describes the dependence of reflectance and absorbance of blood and tissue on the wavelength and suggests appropriate ways of illumination and viewing the bloodstream. The paper describes methods for real-time venous processing and projection. Based on theoretical knowledge a device sensing and projecting an image of real time examination of the venous system and a user-friendly programme for operating this device were created. The created device has been tested on a number of people to confirm proper operation.
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